- natural half-width
- natural halloysite nanotubes
- natural harmony of yin-yang
- natural harmony system
- natural hazard in grasslands caused by poisonous herbaceous plants
- natural heritage
- natural heritage resources of China
- natural history exhibition
- Natural History Museum
- natural history museum
- Natural History Museum of Guangxi Zhuang Autonomous Region
- Natural History Museum of Zimbabwe
- natural history of disease
- natural homomorphism
- natural human computer interaction
- natural immune tolerance
- natural immunity
- natural independence phenomenon
- natural index
- natural indigo
- natural induced polarization effect
- natural inflation
- natural information
- natural information communication
- natural injection